Systemf or obtaining thread by drawing, in particular for glass threads with long fibers



Oct. 22. 1940. A. CERETTI ET AL 2,219,066

SYSTEM FOR OBTAINING THREAD BY DRAWING, IN PARTICULAR FOR GLASS THREADS WITH LONG FIBERS Filed March 22, 1938 Patented 0.3.22, 1940 UNITED STATES PATENT ol-rlcr.

SYSTEM FOR OBTAINING THREAD BY DRAWING, IN PARTICULAR FOR GLASS THREADS WITH LONG FIBERS Application March 22, 1938, Serial No. 197,490

In Luxemburg March 30, 1937 12 Claims.

The present invention refers to a system for reducing a webby drawing, into a large .thread, in particular for glass threads with long fibers.

The invention refers-to a method for forming a web in glass threads by means of a rotating drum which draws the glass threads, coming from two wire drawing appliances connected to two glass furnaces and which move alternately.

in opposite directions and parallel'to the axis of m rotation of the drum, the fibers .or filaments of the web crossing each other'by this process and forming always the same angles to each other.

The present invention has for its object to obtain the large thread in glass, in the form of a ribbon extending along a line parallel to and bisecting the acute angle formed by the filaments or meshes composing the web or bat which is formed by mechanical means.

The ribbons cut in the said direction may be the said cut, that is to say, in a direction parallel to the edges of the ribbons, which are of a length equal to the winding circumference of the drum, or of a length of only a portion of this circumference.

The fibers finally composing the thread will have first a direction slightly inclined with respect to the edges of the ribbon and to this end the lengthof the latter will approximately represent their length, as the drawing continues they will become parallel and are entirely so at the phase of winding on to the drawing bobbin or other equivalent member.

This process of spinning, starting from the web of glass threads produced by mechanical means, may also be utilised for other fibers than those in glass.

The regularity of the angle .of crossing of the filamentary threads formed alternately in one wire drawing such as the filamentary-threads of glass utilised for the said formation of the web' of crossed filamentary threads, this crossing being of strictly uniform direction, there may be gradually drawn out, in a direction parallel to (Cl. 57-156) I obtained large threads or yarns composed of a small number of filamentary threads of large diameter, as well as a larger number of filamentary threads of smaller diameter. Thus, without varying the type of the yarn obtained, thefqualities on the contrary, may vary.

The drawing-out'of the ribbons may be accompanied orpreceded by humidifying by means of a jet of dressing liquid.

The invention will be well understood by means of the following detailed description which refers to the annexed drawing of an embodiment given simply by way of example:

Figure 1 represents a winding drum for the filamentary threads coming from the two furnaces moving in opposite directions parallel to the axis of rotation of the drum;

Figure 2 is a plan view of the jacket, entirely developed, inglass fibers, of a length equal to the circumference of the drum shown in dotted lines.

Figure 3 shows the cutting lines of the ribbons of fibers, these being parallel and bisecting the acute angles formed by the crossing of the filaments;

Figure 4 shows diagrammatically the direction of drawing with respect to the fibers;

Figure 5 shows diagrammatically a system of simultaneous drawing and twisting of the ribbons of long fibers;

v Figure 6 shows the process of formation of long fibered yarn.

Referring particularly to the figures of the drawing:

I is the webof glass thread forming the jacket mounted on the drum 2 and obtained by means of a cut parallel to the axis of the drum. 3 are ribbons obtained by cutting the web in the di-' rection parallel to its length, that is to say, over a length corresponding to the circumference t of the winding drum (Fig. 2.)

- According to the invention, the ribbons 8 are drawn in the direction of the arrow y bisectimg the acute angle formed between any two crossed fibers such as 5 and 6. The result is that the fibers forming the yarn or thread have a length equal to the circumference 4' and this corresponds to a spinning of long fibers carried out in a similar manner to the spinning'of hemp fibers.

The drawing-out may take place by ordinary systems." It should be accompanied naturally by twisting such as shown diagrammatically by Figure 5, where the bobbin 1 is subjected both to a movement of rotation about its axis and also to a movement of rotation about an axisat right angles, by means of the fixed circular rim I which engages the gearing 9 integral with the bobbin. The axis In of the fork I I which supports the bobbin 1 is adapted to rotate by means of the pulleys l2 and set in motion by belts l3 driven by the spindle IS. The system of three rollers 16, l I and I8 give rise to the preliminary The said system of spinning may, however, be

replaced by any other system whatever appropriate to the spinning of long fibers.

We claim:

1. The method of producing artificial fibers which comprises forming a web of filaments, cutting the web into ribbons extending substantially in the direction of said filaments, and drawing the ribbons to arrange the cut filaments substantially parallel.

w 2. The method of producing artificial fibers which comprises forming a web of filaments, cutting the web into ribbons extending substantially in the direction of said filaments, drawing the ribbons to arrange the cut filaments substantially parallel, and twisting the drawn filaments.

3. The method of producing artificial fibers which comprises laying artificial filaments upon a carrier drum, cutting the web formed by the filaments into ribbons extending substantially in the direction of the filaments, and drawing the ribbons into fibers.

4. The method of producing artificial fibers which comprises laying artificial filaments upon .a carrier drum, cutting the cylindrical web formed by the filaments along the length of the drum to derive a plane web of filaments, cutting the plane web of filaments into ribbons extending substantially in the direction of the filaments, and drawing the ribbons into fibers.

5. The step in the method of producing artificial fibers which consists in laying upon a rotary drum two series of artificial filaments crossing each other substantially uniformly at an acute angle and having substantially uniform spacings and direction.

6. The method of producing artificial fibers which comprises laying upon a rotary drum two series of artificial filaments crossing each other substantially uniformly at an acute angle, cutting the web formed by the filaments into ribbons extending substantially parallel to the bisector of the acute angle, and drawing the ribbons to arrange the cut filaments substantially parallel.

7. The method of producing artificial fibers which comprises laying upon a rotary drum two series of artificial filaments crossing each other substantially uniformly at an acute angle, cutting the cylindrical web formed by the filaments longitudinally of the drum to derive a plane web of filaments, cutting the plane web of filaments into threads extending in directions' medially of the angle of crossing of the filaments; with said threads having" a length corresponding to the circumference of the rotary drum, and drawing the threads into long fibers.

8. .The-method of producing artificial fibers which comprlsesrlaying upon a rotary drum two series of artificial filaments crossing each other substantially uniformly at an acute angle, cutting the cylindrical web formed by the filaments longitudinally of the drum to derive a plane web of filaments, cutting the plane web of filaments into ribbons having parallel edges in parallel to the bisector of the angle of crossing of the series of filaments, and drawing the threads to arrange the filaments in substantial parallelism.

9. The method of producing artificial fibers which comprises laying upon a rotary drum two series of artificial filaments crossing each other substantially uniformly at an acute angle, cutting the cylindrical web formed by the filaments longitudinally of the drum to derive a plane web of filaments, cutting the plane web of filaments into ribbons extending in directions medially of the angle of crossing of the filaments, drawing the threads to arrange the filaments in substantial parallelism, and twisting the drawn filaments.

10. The steps in the method of producing arti ficial fibers which consists in laying upon a rotary drum two series of artificial filaments crossing each other substantially uniformly at an acute 'angle and having substantially uniform spacings and direction, and cutting the web of filaments so formed transversely of the fibers and subsequently into ribbon strips along lines in parallel to the bisector of the angle of crossing of the filaments.

11. The method of producing a yarn of glass fibers which comprises winding said fibers upon a drum to form a web having the fibers arranged at angles approaching a right angle to the axial direction of said drum, cutting said web in a direction at right angles to the axis of the drum, and drawing the cut web in a longitudinal direction.

12. The method of producing a yarn of glass fibers which comprises winding long glass fibers upon a drum to form a web having at 'least' a portion of said fibers crossing one anothen-cut ting said web at substantially right angles to'the axis of the drum, and drawing the fibers so-cut in a direction substantiallyparallel to said out to orient said fibers in a predominantly parallel relationship and form a yarn thereof.

ALDO CERETTI. PIERO MODIGLIANI. 

